Q: If a room has a volume of $$1.15 \times 10^8$ cm^3$, what is the volume in km^3$?

$$1.15 \times 10$$^{-7}$$ km^3$

Q: Which of the following is the correct formula for density?

$$\text{Density} = \frac{\text{mass}}{\text{volume}}$$

Question 1

Which of the following is the correct SI base unit for measuring mass?

Accepted Answer

kilogram (kg)

Question 2

A laboratory experiment requires you to convert 0.025 km to centimeters. What is the correct value in centimeters?

Accepted Answer

$$2.5 	imes 10^4$ cm

Question 3

Which of the following measurements is expressed with the correct number of significant figures if the ruler in the image measures to the nearest 0.1 cm and the pencil ends at 9.0 cm?

Accepted Answer

9.0 cm

Question 4

A patient receives 2.75 drops of medication per second for 7 hours. If each drop has a mass of 42 mg, what is the total mass of medication delivered in grams?

Accepted Answer

$$2.89 	imes 10^2$ g

Question 5

Which of the following is an exact number?

Accepted Answer

12 eggs in a dozen

Question 6

What is the density of a solid object with a mass of 0.045 lbs that displaces water from 200 mL to 260 mL? (1 lb = 453.6 g)

Accepted Answer

$$0.347 g/mL$$

Question 7

Which of the following values is given in SI units?

Accepted Answer

101.3 s

Question 8

A cube of lithium metal measures 0.82 cm x 1.45 cm x 1.25 cm and has a mass of 0.794 g. What is its specific gravity at 10.0ºC if the density of water at this temperature is 0.99975 g/mL?

Accepted Answer

0.534

Question 9

Which of the following is the correct answer, with the right number of significant figures, for $$(6.404 	imes 2.91)$$?

Accepted Answer

18.6

Question 10

A pharmaceutical company sells bottles of Lipitor containing 120 pills, each weighing 2.5 g and containing 4.0% active ingredient by mass. What is the total mass of active ingredient in one bottle, in kilograms?

Accepted Answer

$$0.012 kg$

Question 11

Which of the following is the correct SI base unit for measuring the amount of substance?

Accepted Answer

mole (mol)

Question 12

If a room has a volume of $$1.15 	imes 10^8$ cm^3$, what is the volume in km^3$?

Accepted Answer

$$1.15 	imes 10$$^{-7}$$ km^3$

Question 13

Which of the following is the correct reading for the liquid in the burette shown in the image (meniscus at 7.00 mL)?

Accepted Answer

7.00 mL

Question 14

A scientist needs to convert 12 minutes into SI units. What is the correct value?

Accepted Answer

720 s

Question 15

Which of the following is the correct formula for density?

Accepted Answer

$$	ext{Density} = \frac{	ext{mass}}{	ext{volume}}$$

Question 16

Which of the following is the correct SI base unit for measuring temperature?

Accepted Answer

kelvin (K)

Question 17

A piece of unknown solid weighs 0.045 lbs and displaces water from 200 mL to 260 mL. What is the density of the solid in g/mL? (1 lb = 453.6 g)

Accepted Answer

0.347 g/mL

Question 18

Which of the following is the correct SI base unit for measuring length?

Accepted Answer

meter (m)

Chemistry and Measurements: Foundations for Organic Chemistry

Guida di studio - Domande di pratica

Study guide - Flashcard